FILE - In a Wednesday, July 11, 2012 file photo, Steve Niedbalski shows his drought and heat stricken corn while chopping it down for feed in Nashville, Ill. U.S. wholesale prices increased in July from June, pulled up by higher costs for cars and light trucks and the biggest increase in corn prices in nearly six years. The U.S. Agriculture Department said Aug. 10 that the U.S. corn harvest will fall to its lowest level in five years this year because of the drought. The Labor Department said Tuesday, Aug. 14, 2012 that the producer price index, which measures price changes before they reach the consumer, increased a seasonally adjusted 0.3 percent last month. That followed a 0.1 percent gain in June. (AP Photo/Seth Perlman, File)